<template>
	<el-container class="home-container">
		<!-- 头部区域 -->
		<el-header>
			<div>
				<span>电商后台管理系统</span>
			</div>
			<el-button type="info" @click="logout">退出</el-button>
		</el-header>
		<!-- 页面主体区域 -->
		<el-container>
			<!-- 侧边栏 -->
			<el-aside :width="isCollapse ? '64px' : '200px'">
				<div class="toggle-button" @click="toggleCollapse">|||</div>
				<!-- 侧边栏菜单区域 -->
				<el-menu
					background-color="#333744"
					text-color="#fff"
					active-text-color="#409EFF"
					unique-opened
					:collapse="isCollapse"
					:collapse-transition="false"
					:router="true"
					:default-active="activePath"
				>
					<!-- 一级菜单 -->
					<el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
						<!-- 一级菜单的模板区域 -->
						<template slot="title">
							<i :class="iconsObj[item.id]"></i>
							<span>{{ item.authName }}</span>
						</template>
						<!-- 二级菜单 -->
						<el-menu-item
							:index="'/' + subItem.path"
							v-for="subItem in item.children"
							:key="subItem.id"
							@click="saveNavState('/' + subItem.path)"
						>
							<template slot="title">
								<i class="el-icon-menu"></i>
								<span>{{ subItem.authName }}</span>
							</template>
						</el-menu-item>
					</el-submenu>
				</el-menu>
			</el-aside>
			<!-- 主体区域 -->
			<el-main>
				<router-view></router-view>
			</el-main>
		</el-container>
	</el-container>
</template>

<script>
export default {
	data() {
		return {
			// 左侧菜单列表
			menulist: [],
			iconsObj: {
				125: "iconfont icon-user",
				103: "iconfont icon-tijikongjian",
				101: "iconfont icon-shangpin",
				102: "iconfont icon-danju",
				145: "iconfont icon-baobiao",
			},
			// 菜单栏是否折叠
			isCollapse: false,
			// 被激活的链接地址
			activePath: "",
		};
	},
	created() {
		this.getMenuList();
		this.activePath = sessionStorage.getItem("activePath");
	},
	methods: {
		logout() {
			// 清空缓存的 token
			sessionStorage.clear();
			this.$router.push("/login");
		},
		// 获取所有菜单
		async getMenuList() {
			const { data: res } = await this.$http.get("menus");
			if (res.meta.status !== 200) {
				return this.$Message.error(res.meta.msg);
			}
			this.menulist = res.data;
		},
		// 切换菜单折叠展开
		toggleCollapse() {
			this.isCollapse = !this.isCollapse;
		},
		// 保存链接的激活状态
		saveNavState(activePath) {
			sessionStorage.setItem("activePath", activePath);
			this.activePath = activePath;
		},
	},
};
</script>

<style lang="less" scoped>
.home-container {
	height: 100%;
}

.el-header {
	background-color: #373d41;
	display: flex;
	justify-content: space-between;
	padding-left: 0;
	align-items: center;
	color: #fff;
	font-size: 20px;
	> div {
		display: flex;
		align-items: center;
		> span {
			margin-left: 15px;
		}
	}
}

.el-aside {
	background-color: #333744;
	.el-menu {
		border-right: none;
	}
}

.el-main {
	background-color: #eaedf1;
}

.iconfont {
	margin-right: 10px;
}

.toggle-button {
	background-color: #4a5064;
	font-size: 10px;
	line-height: 24px;
	color: #fff;
	text-align: center;
	letter-spacing: 0.2em;
	cursor: pointer;
}
</style>
